PMID: 15244327Jul 13, 2004Paper

Cyanobacterial bloom control by ultrasonic irradiation at 20 kHz and 1.7 MHz

Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
Hongwei HaoQ Wu

Abstract

Ultrasonic irradiations at high frequency of 1.7 MHz and low frequency of 20 kHz were tested to prevent cyanobacteria Spirulina platensis from bloom. The inhibition effectiveness at 1.7 MHz was much greater than that at 20 kHz. The cyanobacteria biomass was reduced by 63% after 5 min ultrasonic irradiation at 1.7 MHz, whereas three days were needed for the tested cyanobacteria to recover its original density. However, longer exposure time did not significantly enhance the inhibition. It was observed after ultrasonic irradiation that the gas vesicles in cells collapsed, which may result in cyanobacterial precipitation and photosynthetic inhibition. The concentration of chlorophyll a (Chla) was reduced and its biosynthesis was delayed in a 4-day continuous culture. The fluorescence spectra at 77K of phycobilisome (PBS) and absorption spectra of intact cells in vivo showed that light energy transfer in PBS was inhibited and phycocyanin (PC) was damaged much more acutely compared with Chla. These results indicated that 5 min ultrasonic irradiation at 1.7 MHz every third day might be an effective and economic operation mode for practical application.

References

Feb 1, 1993·Biochemical Society Transactions·R C Ford, M A Cochrane
May 2, 2001·Environmental Technology·T J LeeM Matsumara
Jun 16, 2001·Acta Crystallographica. Section C, Crystal Structure Communications·X J XieK L Tang
Jul 10, 2001·Ultrasonics Sonochemistry·K C TeoC Yang
Jan 5, 2002·Environmental Science & Technology·K NakanoM Matsumura

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Citations

Mar 19, 2014·Ultrasonics Sonochemistry·Alfonso Rodriguez-MolaresMike Burch
Nov 29, 2011·Water Research·Pradeep RajasekharFelicity A Roddick
Nov 1, 2011·Environmental Pollution·Zhicong WangYinxia Li
Jun 6, 2015·Critical Reviews in Food Science and Nutrition·Kumar RanganathanNadanasabapathi Shanmugam
Sep 23, 2014·Water Research·Miquel Lürling, Yora Tolman
Jun 28, 2008·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Zi LiHisamichi Fujiwara
Mar 13, 2018·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Fei ZhongShuiping Cheng
Dec 13, 2017·Biofouling·Ji-Soo Park, Jeung-Hoon Lee
Apr 20, 2010·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Eadaoin M JoyceTimothy J Mason
Jan 18, 2006·Ultrasonics Sonochemistry·Guangming ZhangBo Wang
Dec 17, 2008·Ultrasonics Sonochemistry·Guangming ZhangMaohong Fan
Dec 20, 2005·Ultrasonics Sonochemistry·Guangming ZhangHong Liu
May 16, 2019·Ultrasonics Sonochemistry·Jungsu ParkWoo Hyoung Lee

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